CVE-2026-35537
Detail
Description
An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. Unsafe deserialization in the redis/memcache session handler may lead to arbitrary file write operations by unauthenticated attackers via crafted session data.
Metrics
NVD enrichment efforts reference publicly available information to associate
vector strings. CVSS information contributed by other sources is also
displayed.
CVSS 4.0 Severity and Vector Strings:
NVD assessment
not yet provided.
CVSS 3.x Severity and Vector Strings:
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
CVSS 2.0 Severity and Vector Strings:
Base
Score:
NVD assessment
not yet provided.
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Weakness Enumeration
| CWE-ID |
CWE Name |
Source |
|
CWE-502
|
Deserialization of Untrusted Data |
MITRE
|
Change History
5 change records found show changes
CVE Modified by CISA-ADP
6/17/2026 6:40:44 AM
| Action |
Type |
Old Value |
New Value |
| Added |
SSVC |
{"timestamp":"2026-04-03T13:11:34.838938Z","id":"CVE-2026-35537","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}
|
CVE Modified by MITRE
6/17/2026 6:40:44 AM
| Action |
Type |
Old Value |
New Value |
| Added |
Affected |
[{"vendor":"Roundcube","product":"Webmail","defaultStatus":"unaffected","versions":[{"version":"0","lessThan":"1.5.14","versionType":"semver","status":"affected"},{"version":"1.6.0","lessThan":"1.6.14","versionType":"semver","status":"affected"}]}]
|
Initial Analysis by NIST
4/13/2026 1:54:32 PM
| Action |
Type |
Old Value |
New Value |
| Added |
CVSS V3.1 |
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
|
| Added |
CPE Configuration |
OR
*cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:* versions up to (excluding) 1.5.14
*cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:* versions from (including) 1.6.0 up to (excluding) 1.6.14
|
| Added |
Reference Type |
CVE: http://www.openwall.com/lists/oss-security/2026/04/11/6 Types: Issue Tracking, Mailing List
|
| Added |
Reference Type |
MITRE: https://github.com/roundcube/roundcubemail/commit/618c5428edc69fb088e7ac6c89e506dd39df3 Types: Patch
|
| Added |
Reference Type |
MITRE: https://github.com/roundcube/roundcubemail/commit/6d586cfa4d8a31f7957f7a445aaedd52592a0e74 Types: Patch
|
| Added |
Reference Type |
MITRE: https://github.com/roundcube/roundcubemail/commit/a4ead994d2f0ea92e4a1603196a197e0d5df1620 Types: Patch
|
| Added |
Reference Type |
MITRE: https://github.com/roundcube/roundcubemail/releases/tag/1.5.14 Types: Release Notes
|
| Added |
Reference Type |
MITRE: https://github.com/roundcube/roundcubemail/releases/tag/1.6.14 Types: Release Notes
|
| Added |
Reference Type |
MITRE: https://github.com/roundcube/roundcubemail/releases/tag/1.7-rc5 Types: Release Notes
|
| Added |
Reference Type |
MITRE: https://roundcube.net/news/2026/03/18/security-updates-1.7-rc5-1.6.14-1.5.14 Types: Third Party Advisory
|
CVE Modified by CVE
4/11/2026 11:16:22 AM
| Action |
Type |
Old Value |
New Value |
| Added |
Reference |
http://www.openwall.com/lists/oss-security/2026/04/11/6
|
New CVE Received from MITRE
4/03/2026 12:17:10 AM
| Action |
Type |
Old Value |
New Value |
| Added |
Description |
An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. Unsafe deserialization in the redis/memcache session handler may lead to arbitrary file write operations by unauthenticated attackers via crafted session data.
|
| Added |
CVSS V3.1 |
AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
|
| Added |
CWE |
CWE-502
|
| Added |
Reference |
https://github.com/roundcube/roundcubemail/commit/618c5428edc69fb088e7ac6c89e506dd39df3
|
| Added |
Reference |
https://github.com/roundcube/roundcubemail/commit/6d586cfa4d8a31f7957f7a445aaedd52592a0e74
|
| Added |
Reference |
https://github.com/roundcube/roundcubemail/commit/a4ead994d2f0ea92e4a1603196a197e0d5df1620
|
| Added |
Reference |
https://github.com/roundcube/roundcubemail/releases/tag/1.5.14
|
| Added |
Reference |
https://github.com/roundcube/roundcubemail/releases/tag/1.6.14
|
| Added |
Reference |
https://github.com/roundcube/roundcubemail/releases/tag/1.7-rc5
|
| Added |
Reference |
https://roundcube.net/news/2026/03/18/security-updates-1.7-rc5-1.6.14-1.5.14
|
Quick Info
CVE Dictionary Entry: CVE-2026-35537 NVD
Published Date: 04/03/2026 NVD
Last Modified: 06/17/2026
Source: MITRE
|
